Grate.



PATENTED JUNE 4, 1907.

' H. A. SMITH.

GRATE.

APPLICATION FILED JULY 7, 1906.

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No. 855,538. PATENTED JUNE 4, 1907.

' H, A. SMITH.

'GRATE.

. APPLICATION FILED JULY 7, 1906.

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' avwenfoz HENRY A. SMITH, or GURLEY, ALABAMA.

GRATE.

Specification of Letters Patent.

Patented June 4, 1907.

Application filed July 7, 1906. Serial No. 325,099.

To all whom it may concern.-

Be it known that I, HENRY A. SMITH, a citizen of the United States, residing at Gurley, in the county of Madison, State of Alabama, have invented certain new and useful Improvements in Grates; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to grates for furnaces and more particularly to air feeding grates, and has for its object to provide a grate of this kind of novel structure and one in which the parts thereof may be easily removed to permit of replacements, fastening devices likely to become warped by the heat being eliminated.

Other objects and advantages will be apparent from the following description, and it is to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

In the drawings forming a portion of this specification and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a top plan view of the grate, the furnace walls being shown in section. Fig. 2 is a transverse section on line 22 of Fig. 1, showing the lever mechanism of the rocking bars. Fig. 3 is a longitudinal section on line 38 of Fig. 1, taken through.

one of the air bars. Fig. 4 is a detail view showing one of the bracket plates in elevation, and illustrating its connection with the end members of the air bar. Fig. 5 is a horizontal section 011 line 55 of Fig. 4, taken in the plane of the pins and through a portion of the adjacent rocking bar. Fig. 6 is a front view of the furnace showing the oper ating lever. Fig. 7 shows a modified form of lever and its connection with the rock shaft.

Referring now to the drawings, there is shown a furnace including walls and having transverse sills S and 9 therewithin adjacent to its rearward and forward portions respectively. A plurality of longitudinally extending hollow air bars 10 are provided and have end members 11 which extend laterally beyond the bars in opposite directions and which have outwardly extending flanges 11 at their upper edges, and these members are disposed with their flanges upon the sills 8 and 9 with the air bars extending between these sills, the several end members alining longitudinally, as shown.

The airbars 10 are of cylindrical form and have oppositely extending horizontal longitudinal flanges 12, and longitudinal depending truss ribs 13. The upper portions of the air bars above their flanges 12 are provided with radial openings 14 for the passage of air therefrom, and between these pipes 15 are connected with the air bars and with an air supply pipe 16.

Each end member 11 has a pair of inwardly extending pins 17 engaged therein, one at each side of its air bar 10, so that there are a pair of these pins 17 between each pair of the air bars 10 and at each end thereof, one pin being carried by the end member of each bar.

Bracket plates 18 are provided and have notches 19 in their lower edges which re ceive the pins 17, one bracket plate thus resting upon each pair of pins, and each bracket plate has in its upper surface a bearing notch 20. The bracket plates thus he in pairs between the air bars 10 for the reception in their notches 20 of trunnions 21 of the rocking bars 22, which are disposed between the air bars and the bracket plate. Laterally extending vertical wings 23 are carried by the air bars 10 and lie with their upper surfaces flush with the flanges 12, the wings of the mutually adjacent air bars meeting at their free ends and being notched at their upper corners, to form recesses 24 which receive the simple rounded reduced portions 25 of the rocking bars 22, these wings thus acting as supports for the central portions of the rocking bars.

The several rocking bars 22 have depending fingers 26 which are connected by a link 27 pivoted thereto, and journaled beneath the grate, there is a rock shaft 28 having an upwardly extending arm 29 which is connected by means of a link 30 with the link 27. The rock shaft 28 extends through the forward wall of the furnace and has an operating lever 31 engaged with its forward end, this lever being provided with an opening 32 for the reception of a pin 33, and it will be seen that the pin may be grasped in the hand to move the lever and therewith the rock shaft, this movement resulting in rocking of the bars 22, and an opening 33 is formed in the forward wall of the furnace and is positioned to receive the inner end of the pin 33 ICS IIC

resting upon the pins,

when the latter is pushed inwardly through the lever 31, to hold the lever with the rocking bars in normal horizontal position.- The rocking bars may be moved through the medium of the levers into laterally tilted position, to admit air in greater uantities through the grate, and may be helr in such position by enga ement of the pin 33 in an opening 34 formed 111 the forward wall of the furnace, the lever 31 engaging the pin.

In Fig. 7, there is shown a modified form of the invention in which the shaft 28 is provided with a gear 35, and a lever 31 is pivoted upon the wall of the furnace and has a gear segment 36 at its lower end meshing with the gear 35. I

WVhat is claimed is:

1. A grate comprising spaced bars, end members carried by the bars, pins carried by the end members, bracket plates having notches in which the pins are engaged and. said bracket plates having notches in their upper surfaces, and a rocking bar having trunnions engaged in the last named notches of the rocking'plates.

2. A grate comprising spaced bars, alining wings carried one by each bar and extending between the bars, the upper portions of said wings being cut away at their meeting ends to form a recess, and a movable bar journaled between the first named bars and having a reduced portion between its ends movably engaged in the recess.

3. A grate comprising sills, spaced air bars located between the sills, flanged end members carried by the air bars with their flanges resting u on the sills, the end members at each sill being disposed in alinement, a pair of pinslocated between the mutually adjacent bars at each end thereof, said pins being carriedone by each end member, bracket plates engaged with the pins, rocking bars aving trunnions journaled in the bracket plates and lying between the mutually adjacent air bars, wings carried by the air bars and extending therebetween and having recesses therein, said rocking bars having reduced intermediate portions movably engaged in the recesses, means for moving the rocking bars, and means for supplying air to the air bars, said bracket and plates being removable from the pins.

4. The combination with a furnace, of a grate therefor having an operating shaft, said furnace having an opening in one of its walls, an operating lever carried by the shaft and having an opening therein, and a pin slidably engaged in the opening of the lever for movement therethrough into and out of engagement in the opening of the wall.

5. A grate comprising sills, bars having flanged end members and disposed with their flanges upon the sills, said bars and end members lying between the sills, a pair of inwardly extending pins carried by each end member adjacent to its opposite ends, bracket plates having notches in their lower edges, said bracket members being disposed each with the pins of separate end members removably engaged in their notches, and bars pivotally connected with the bracket giembers and lying between the first named ars.

In testimony whereof, I afIiX my signature,

in presence of two witnesses.

HENRY A. SMITH.

\Vitnesses:

H. G. CREAL, MARIA COLLIER. 

